Walker Laser Noise Cancelling Headphones Noise Reduction Rating of 23.4 Decibels 2 x Omni Directional Microphones Full Dynamic Range HD Speakers For Clear Balanced Sound. Sound Activated Compression (0.02 Second Reaction Time) 3.5mm Audio Input Jack Recessed Volume Control Knob Comfort Headband External Battery Door Requires 2 x AAA Batteries (not included)
